Actually I'm pretty rusty on this end of things these days and I also thought you meant at run time. You can probably compile your code to an object file then have people include that in their project at the link stage. But I don't think you could do that under the Arduino IDE, you'd have to get down and dirty with make files.

joshuaj

I need to provide updates for the micro to the UI developer in a remote location. He's not an embedded developer and has no need to see the source code. He just needs update to functionality as they become available.